Natural gas can be an alternative fuel for ships in coastal zones to minimize the emissions of CO2, NOX, and particulates from diesel engines. However, unburnt methane can slip from the engine, causing another emission problem. CH4 is a green-house gas with an atmospheric potential of 26-28 times that of CO2  and it need to be mitigated from the exhaust gas. Converting CH4 to CO2 and H2O catalytically in the after treatment system can be promising. However, an efficient catalyst that remains sufficiently active under real exhaust gas conditions (350-550 °C, 5-10 vol.% H2O and 1-2 ppm SO2) is still being sought. Pd based catalysts are the most active in the absence of H2O and SO2, but they deactivate severely by SO2 even at low ppm levels. In this contribution, it is investigated if Rh catalysts on a suitable carrier material can be developed to tolerate the exhaust gas conditions above. Here Rh/ZSM-5 was prepared and tested under simulated engine exhaust gas conditions with both H2O and SO2 present. The influence of operating temperature and SO2 concentration were studied.
|Publication status||Published - 2019|
|Event||14th European Congress on Catalysis: Catalysis without Borders - Eurogress Aachen, Aachen, Germany|
Duration: 18 Aug 2019 → 23 Aug 2019
Conference number: 14
|Conference||14th European Congress on Catalysis|
|Period||18/08/2019 → 23/08/2019|
Zhang, Y., Christensen, J. M., Jensen, A. D., Glarborg, P., & Johansen, K. (2019). Rh/ZSM-5 as a Sulfur Tolerant Catalyst for Methane Oxidation. Abstract from 14th European Congress on Catalysis, Aachen, Germany.